22-100872-Water and Sewer Availability Certificates-3-23-22-V1RECEIVED
3/28/2022
CITY OF FEDERAL WAY
COMMUNITY DEVELOPMENT
Lakehaven
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AMV, . .
Lakehaven Water & Sewer District - Development Engineering Section
31623 - 1st Ave S * PO Box 4249 Federal Way, WA 98063-4249
Email: DE@Lakehaven.org * Telephone: 253-945-1581 or 253-945-1580
This certificate is intended to provide the applicant, land use agencies &,/or public health departments with
information necessary to evaluate development proposals. Lakehaven Water & Sewer District, at its sole
discretion, reserves the right to delay, or deny, water service based upon capacity &/or supply limitations
in Lakehaven's or Other Purveyor's system facilities.
Proposed Land Use: ❑ Building Permit-SFR {) ❑ Building Permit-MFR. () ❑ Building Permit -Other
❑ Subdivision () ❑ Short Subdivision () ❑ Binding Site Plan
❑ Boundary Line Adjustment ® Other (specify/describe) All
Tax Parcel Number(s): 0721049246 Site Address: E43 SW 312th St LWSD GIS Grid: G-08
Ex. Bldg. Area to Remain: 1,902 sf NewjAdditional Bldg. Area Proposed: 668 sf
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WATER SYSTEM INFORMATION
2. ® Water service can be provided by service connection to an existing 12" diameter water main that is approximately 45+/-
feet from the site.
2. ❑ Water service for the site will require an improvement to LWSD's water distribution system of:
❑ a, feet of " diameter water main to reach the site; and/or
❑ b. The construction of a water distribution system on the site; and/or
❑ c. A major portion of LWSD's comprehensive water system plan would need to be implemented and/or
constructed; and/or
❑ d. Other (describe):
3. ® a. The existing water system is in conformance with LWSD's Comprehensive Water System Plan.
❑ b. The existing water system is not in conformance with LWSD's Comprehensive Water System Plan and an
Amendment to this Plan will be required. This may cause a delay in issuance of land use approvals or permits.
4. ® a. The subject property is within the corporate limits of Lakehaven Water & Sewer District, or has been granted
Boundary Review Board approval for extension of water service outside of LWSD's water service area.
❑ b. Annexation or Boundary Review Board approval will be necessary to provide service.
5. Water service is subject to:
® a. Payment of connection charges (to be determined by LWSD, for any new/modified service connection);
❑ b. Proof or reservation of easement(s) as required by LWSD;
® c. Other: The existing 1" m t r ho Ild bP pw%hua d under UPC & LWSD standards to determine if it's adeq�late for
the proposed use. LWSD Service Connection Application required for any new/modified service connection.
Comments/special conditions: Service oressure(s) greater than 80 psi indicated, Pressure Reducing Valve(s) indicated contact local
building official for reguirements_Wor additional information.
The nearest fire hydrant is approximately 225+/ feet from the Property (as marked on map on the back of this page.
System hydraulic model results (FF #297, copy attached), at no less than 20 psi, indicate that LWSD's standard maximum allowable
liquid velocity of 10 ft/s is exceeded at a fire flow rate above 5,300 GPM for two (2) hours or more. This flow figure depicts the
theoretical performance of the water distribution system under high demand conditions. Fire flow rates greater than this may be
accommodated through water distribution system improvements, contact LWSD for additional information.
538 Pressure Zone Est. Meter Elevation(s)-GIS: 315+/- Est. Pressure Range at Meter(s) (psi): 87-96
I hereby certify that the above water system information is true. This certification shall be valid for one (1) year from the date of
signature.
Name: BRIAN ASBURY Title: DEVELOPMENT ENGINEERING SUPERVISOR
Signature: Aian ffifff t[L fe-signed)
Date: 1111512
0721049246 wtr swr.docx (Form Update 3/13/20) Page 1 of 4
0721049246 wtr swr.docx (Form Update 3/13/20) Page 2 of 4
Lakehaven
Lakehaven Water & Sewer District - Development Engineering Section
31623 - 1st Ave S PO Box 4249 Federal Way, WA 98063-4249
Telephone: 253-945-1581 or 253-945-1580 * Email: DE@Lakehaven.org
This certificate is intended to provide the applicant, land use agencies &/or public health departments with
information necessary to evaluate development proposals. Lakehaven Water & Sewer District, at its sole
discretion, reserves the right to delay, or deny, sewer service based upon capacity &/or supply limitations
in Lakehaven's or Other Purveyor's system facilities.
Proposed Land Use: ❑ Building Permit-SFR () ❑ Building Permit-MFR () ❑ Building Permit -Other
❑ Subdivision O ❑ Short Subdivision O ❑ Binding Site Plan
❑ Boundary Line Adjustment 0 Other (specify/describe) ADU
Tax Parcel Number(s): 0721049246 Site Address: 843 SW 312th St LWSD GIS Grid: G-08
Ex. Bldg. Area to Remain: 1,902 sf New/Additional Bldg. Area Proposed: 668 sf
SEWER SYSTEM INFORMATION
1. ® Sewer service can be provided by service connection to an existing service connection to an existing gf diameter sewer
main that is approximately 5±L- feet from the site and the sewer system has the capacity to serve the proposed land use,
2. ❑ Sewer service for the site will require an improvement to LWSD's sanitary sewer system of:
❑ a. __ feet of " diameter sewer main or trunk to reach the site; and/or
❑ b. The construction of a sanitary sewer collection system on the site; and/or
❑ c. A major portion of LWSD's comprehensive wastewater system plan would need to be implemented and/or
constructed; and/or
❑ d. Other (describe):
3. ® a. The existing sewer system is in conformance with LWSD's Comprehensive Wastewater System Plan.
❑ b. The existing sewer system is not in conformance with LWSD's Comprehensive Wastewater System Plan and an
Amendment to this Plan will be required. This may cause a delay in issuance of land use approvals or permits.
4. ® a. The proposed site land use is within the corporate limits of Lakehaven Water & Sewer District, or has been granted
Boundary Review Board approval for extension of sewer service outside of LWSD's sewer service area.
❑ b. Annexation or Boundary Review Board approval will be necessary to provide service.
S. Sewer service is subject to:
® a. Payment of connection charges (to be determined by LWSD, for any new/modified service connection);
❑ b. Proof or reservation of easement(s) as required by LWSD;
❑ c. Other: LWSD Service Connection Application required for any new/ma ified service connection. .
Comments/special conditions: If a detached ADU is proposed Backwater Check Valve indicated for lower finish floor building, contact
local building official for rg uirements alor additional information.
I hereby certify that the above sewer system information is true. This certification shall be valid for one (1) year from the date of
signature.
Name: BRIAN ASBURY Title: DEVELOPMENT ENGINEERING SUPERVISOR
Signature: Xld= a.,& i4 je-signed) Date: 11115,121
0721049246 wtr swr.docx (Form Update 3/13/20) Page 3 of 4
Hydraulic Model Fire Flow Estimate
Request/Reporting Form
Requested By:
Kathy Brown
Da e:
1)
I //- 1/14
Location to be VWded: Hydrant 9,517 off of SW 312"' Street
Lakchaven �/,i Scdion Grid:
7Y-0"
t"hiletsection: SW )12t" fit} cast of I OAve SW
Add. Deseripfiou:
I See attached map
538
1� VI-11�
FToTResults BY:
Date:
Modd Run No.:
Joh.11 Bowill
4 k�,—
1/21/14
Master Watet- System Model 2007,ilct
FF #297
Condition
Pressure (psi)
'Flow (gPI11)
Static
78
0
Fire Flow
20
10,900
NOTES:
Lakehaven's adopted level of service goals for fire flow rates are 1.000 glim within sin(-1=Ie
1
family residential areas (including duplexes) aad 2500 gpin for multi -family, commercial,
industrial areas.
Model results depict the flicorcticat performance of the water SySteill under high dernand
conditions and are not guaranteed to represent actual system perf'ormance. A design
professional should be consulted for site specific design purposes.
'The calculated fire flow capacity in the above table is based on a currently available residuat
system pressure, of 20 psi at the location modeled, The model indicates that La kehaven's
standard maximum allowable velocity of 10 II/s is exceeded at as fire flow rate above 5300
opal. Fire flow capacities greater than 5300 gprn may be accommodated through water
system improvements.
0121 141`1`297 Filinnore (Fotm Rcs,, 12/6113)
0721049246 wtr swr.docx (Form Update 3/13/20) Page 4 of 4
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